5.56 NATO (5.56×45) INERT dummy rounds in M249 machine gun links with four simulated M855 “Green Tips” to one simulated orange tracer. These are the same links used by the US military in the M249 Squad Automatic Weapon or “SAW” as it is affectionately known as by GIs. Properly sized, seated, and crimped. Real brass and bullets, but spent primers remain for identification. Great for reenactors, airsoft players, costumes, or just display.